For my money ... Taylorsville Lake (between E-town & Lexington) - Barren River Lake (SE of Bowling Green) - Green River Lake (NE of Bowling Green & a little outside of the E-town/BG/Lex triangle)
FWIW ... I've never fished Barren River Lake, but have seen good reports from the members that do ... and it's within the triangle you described.
... cp